code: def get_default_framework() -> framework_type:
      """Retrieve default deep learning framework set either with env variables or manually."""
      return DEFAULT_FRAMEWORK
  
file_path: nni/nni/common/framework.py
imports: import importlib
  import os
  import sys
  from typing import Optional, cast
  from typing_extensions import Literal
label_desc: Use image node_id 3 for calling a global function with example usage: get_default_framework() and returns: DEFAULT_FRAMEWORK